Why does iOS prompt repeatedly ask for Apple ID password?

Dear Apple Support Community,

Device: iPad 4th Generation (64GB WiFi + Cell/LTE)

iOS Version: Latest version at time of publish - 6.1.3 (6.1.4 is iPhone specific)

SITUATION: I am prompted for Apple ID password every time I access App Store or iTunes. Typically, this should only be required to confirm purchase(s) or if password has "timed out" between purchases.

Additional Information: I suspect this is associated with Pre-ordered Movies and Music. This was experienced only after Pre-orders on all versions of iOS 5 and 6.

Thanks in advance for your help, guidance, and coaching a "Technoid."